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HowShorted

How shorted is AtriCure, Inc.? ATRC

#911most shorted US stockof 3,805 ranked stocks, more shorted than 76%

8.41%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.27
5 reports (~10 weeks)
−0.38
days to cover
3.62
Aggregate net short position time series for AtriCure, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for AtriCure, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
23 Jul 20269.61% 15 Jul 20267.60% 31 Jul 2026−2.01
5 May 20267.75% 30 Apr 20268.75% 15 May 2026+1.00
17 Feb 20266.92% 13 Feb 20266.32% 27 Feb 2026−0.60
12 Jan 20264.76% 31 Dec 20255.05% 15 Jan 2026+0.29
29 Oct 20254.12% 15 Oct 20254.63% 31 Oct 2025+0.51
29 Jul 20253.06% 15 Jul 20254.48% 31 Jul 2025+1.42
29 Apr 20252.75% 15 Apr 20253.09% 30 Apr 2025+0.34
12 Feb 20252.40% 31 Jan 20252.61% 14 Feb 2025+0.21

Fails to deliver

The SEC's fails-to-deliver figure for ATRC: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
11,918
10 Sep 2026
Highest in window
49,994
1 Oct 2025
Days with a balance
34
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for AtriCure, Inc. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 50K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20268.41%+0.27
31 Aug 20268.14%+0.43
14 Aug 20267.71%+0.11
31 Jul 20267.60%−2.01
15 Jul 20269.61%+0.82
30 Jun 20268.79%+1.99
15 Jun 20266.80%+0.08
29 May 20266.72%−2.03
15 May 20268.75%+1.00
30 Apr 20267.75%+0.50
15 Apr 20267.25%+0.14
31 Mar 20267.11%+0.26
13 Mar 20266.85%+0.53
27 Feb 20266.32%−0.60
13 Feb 20266.92%+1.87
30 Jan 20265.05%0.00
15 Jan 20265.05%+0.29
31 Dec 20254.76%−0.27
15 Dec 20255.03%+0.40
28 Nov 20254.63%−0.51
14 Nov 20255.14%+0.51
31 Oct 20254.63%+0.51
15 Oct 20254.12%−0.32
30 Sep 20254.44%+0.30
15 Sep 20254.14%−0.05
29 Aug 20254.19%+0.26
15 Aug 20253.93%−0.55
31 Jul 20254.48%+1.42
15 Jul 20253.06%−0.06
30 Jun 20253.12%−0.03
13 Jun 20253.15%−0.55
30 May 20253.70%+0.54
15 May 20253.16%+0.07
30 Apr 20253.09%+0.34
15 Apr 20252.75%+0.01
31 Mar 20252.74%−0.73
14 Mar 20253.47%+0.56
28 Feb 20252.91%+0.30
14 Feb 20252.61%+0.21
31 Jan 20252.40%−0.62
15 Jan 20253.02%−0.31
31 Dec 20243.33%+0.05
13 Dec 20243.28%−0.19
29 Nov 20243.47%+0.04
15 Nov 20243.43%−1.18
31 Oct 20244.61%−2.14
15 Oct 20246.75%−0.63
30 Sep 20247.38%+0.10
13 Sep 20247.28%−0.07
30 Aug 20247.35%−0.13
15 Aug 20247.48%+1.09
31 Jul 20246.39%−1.12
15 Jul 20247.51%−0.12
28 Jun 20247.63%+0.81
14 Jun 20246.82%−0.47
31 May 20247.29%+0.90
15 May 20246.39%+0.23
30 Apr 20246.16%−0.56
15 Apr 20246.72%−0.10
28 Mar 20246.82%+0.57
15 Mar 20246.25%+1.26
29 Feb 20244.99%+0.07
15 Feb 20244.92%+0.24
31 Jan 20244.68%+0.60
12 Jan 20244.08%+0.44
29 Dec 20233.64%−0.45
15 Dec 20234.09%−0.05
30 Nov 20234.14%+0.72
15 Nov 20233.42%+0.52
31 Oct 20232.90%+0.40
13 Oct 20232.50%−0.12
29 Sep 20232.62%−0.21
15 Sep 20232.83%+0.23
31 Aug 20232.60%+0.68
15 Aug 20231.92%+0.24
31 Jul 20231.68%−0.50
14 Jul 20232.18%−0.23
30 Jun 20232.41%−0.71
15 Jun 20233.12%−0.59
31 May 20233.71%+0.11
15 May 20233.60%−0.12
28 Apr 20233.72%+0.05
14 Apr 20233.67%−0.01
31 Mar 20233.68%+0.07
15 Mar 20233.61%−0.26
28 Feb 20233.87%+0.44
15 Feb 20233.43%+0.90
31 Jan 20232.53%−0.24
13 Jan 20232.77%−0.33
30 Dec 20223.10%+0.48
15 Dec 20222.62%−0.14
30 Nov 20222.76%−0.07
15 Nov 20222.83%+0.23
31 Oct 20222.60%−0.33
14 Oct 20222.93%−0.53
30 Sep 20223.46%−0.18
15 Sep 20223.64%−0.49
31 Aug 20224.13%+0.66
15 Aug 20223.47%−0.16
29 Jul 20223.63%−0.30
15 Jul 20223.93%+0.07
30 Jun 20223.86%−0.25
15 Jun 20224.11%+0.41
31 May 20223.70%−0.19
13 May 20223.89%+0.23
29 Apr 20223.66%+0.20
14 Apr 20223.46%+0.10
31 Mar 20223.36%−0.05
15 Mar 20223.41%+0.17
28 Feb 20223.24%+0.13
15 Feb 20223.11%+0.17
31 Jan 20222.94%−0.02
14 Jan 20222.96%+0.38
31 Dec 20212.58%+0.23
15 Dec 20212.35%+0.09
30 Nov 20212.26%+0.75
15 Nov 20211.51%−0.53
29 Oct 20212.04%−0.06
15 Oct 20212.10%−0.15
30 Sep 20212.25%+0.22
15 Sep 20212.03%+0.05
31 Aug 20211.98%−0.02
13 Aug 20212.00%−1.01
30 Jul 20213.01%−0.77
15 Jul 20213.78%−0.42
30 Jun 20214.20%−0.06
15 Jun 20214.26%−0.25
28 May 20214.51%+0.10
14 May 20214.41%−0.19
30 Apr 20214.60%+0.24
15 Apr 20214.36%−0.43
31 Mar 20214.79%+0.42
15 Mar 20214.37%−1.38
26 Feb 20215.75%+1.31
12 Feb 20214.44%+0.06
29 Jan 20214.38%−0.80
15 Jan 20215.18%+0.15
31 Dec 20205.03%−0.13
15 Dec 20205.16%+0.19
30 Nov 20204.97%+0.79
13 Nov 20204.18%+0.23
30 Oct 20203.95%−0.48
15 Oct 20204.43%−0.54
30 Sep 20204.97%+0.77
15 Sep 20204.20%−0.41
31 Aug 20204.61%+0.60
14 Aug 20204.01%+0.59
31 Jul 20203.42%−0.09
15 Jul 20203.51%+0.25
30 Jun 20203.26%+0.71
15 Jun 20202.55%+0.11
29 May 20202.44%−0.27
15 May 20202.71%+0.44
30 Apr 20202.27%−1.12
15 Apr 20203.39%−0.51
31 Mar 20203.90%+1.12
13 Mar 20202.78%+0.72
28 Feb 20202.06%0.00
14 Feb 20202.06%−0.08
31 Jan 20202.14%−0.07
15 Jan 20202.21%+0.23
31 Dec 20191.98%+0.03
13 Dec 20191.95%−0.04
29 Nov 20191.99%−0.18
15 Nov 20192.17%+0.09
31 Oct 20192.08%−1.31
15 Oct 20193.39%+0.35
30 Sep 20193.04%−0.20
13 Sep 20193.24%+0.57
30 Aug 20192.67%+0.17
15 Aug 20192.50%+0.01
31 Jul 20192.49%−0.29
15 Jul 20192.78%−0.13
28 Jun 20192.91%−0.74
14 Jun 20193.65%−0.28
31 May 20193.93%−0.41
15 May 20194.34%+0.03
30 Apr 20194.31%+0.20
15 Apr 20194.11%−0.38
29 Mar 20194.49%−0.49
15 Mar 20194.98%+0.57
28 Feb 20194.41%−0.14
15 Feb 20194.55%+0.12
31 Jan 20194.43%−0.20
15 Jan 20194.63%−0.06
31 Dec 20184.69%+0.37
14 Dec 20184.32%+0.04
30 Nov 20184.28%0.00
15 Nov 20184.28%+0.14
31 Oct 20184.14%−0.07
15 Oct 20184.21%−1.54
28 Sep 20185.75%+0.09
14 Sep 20185.66%−0.26
31 Aug 20185.92%+0.10
15 Aug 20185.82%−0.05
31 Jul 20185.87%+0.11
13 Jul 20185.76%−0.09
29 Jun 20185.85%+0.89
15 Jun 20184.96%−0.01
31 May 20184.97%−1.12
15 May 20186.09%−0.19
30 Apr 20186.28%−0.16
13 Apr 20186.44%−0.19
29 Mar 20186.63%+0.29
15 Mar 20186.34%+0.38
28 Feb 20185.96%0.00
15 Feb 20185.96%−0.16
31 Jan 20186.12%+0.25
12 Jan 20185.87%+0.17
29 Dec 20175.70%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is AtriCure, Inc. right now?
8.41% of AtriCure, Inc.'s (ATRC) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 911th most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this ATRC's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is ATRC's days to cover?
3.62 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.